共 6 条
[1]
[Anonymous], NEW DIRECTIONS PROGR
[2]
Boruch R.F., 1997, Randomized experimentsfor planning and evaluation: a practical guide
[3]
CONRAD KJ, 1994, NEW DIRECTIONS PROGR, V63
[4]
COOK TD, 1979, QUASI EXPT DESIGN AN
[5]
FETTERMAN DM, 1982, EDUC EVAL POLICY AN, V4, P261
[6]
FETTERMAN DM, 1994, NEW DIRECTIONS PROGR, V63, P103